Abstract: A digital-data-transmission system includes a network formed from a multiplicity of nodes each having at least three pairs of input/output terminals of which one is connected to an associated subscriber station while the others are connected to respective other nodes so as to enable a binary message from any subscriber station to reach all other subscriber stations. The nodes form a plurality of pathways, at least some of them of different lengths, between any two subscriber stations yet a decision circuit at each node selects only one input terminal thereof for retransmission of an incoming message to all the output terminals of the node, such selection being based on the order of arrival or--in the case of simultaneous arrival--on a predetermined order of preference. The several subscriber stations may be equipped with respective controllers establishing time slots individually allocated thereto in order to prevent the simultaneous emission of messages from two or more stations.

Abstract: A magnetic domain propagation register carrying out the propagation of the domains under the effect of electric currents, comprising an insulating substrate, a soft magnetic layer on the insulating substrate, in which is formed a propagation channel, a hard magnetic layer on the soft magnetic layer, except in areas defining the propagation channel, an insulating layer on the soft and hard magnetic layers, and a conduction layer in a Greek border pattern on the insulating layer, constituted by parallel segments perpendicular to the propagation channel, the propagation channel comprising widened boxes at the intersection of the propagation channel with the segments of the conduction layer.

Abstract: A pneumatic program register comprising a plurality of sequential by cascaded modules, each module comprising a pneumatic flip-flop, an AND cell with two inputs and an OR cell with two inputs, one input of said OR cell being connected with the output of said flip-flop of same module, said output of said flip-flop being also connected with one of the inputs of said AND cell of same module, the other input of said OR cell being connected, on the one hand, with the output of the OR cell of the following sequential module, so that the OR cells of all sequential modules are connected in series, and, on the other hand, with the reset port of said flip-flop of the same module, the trigger input of said flip-flop being connected with the output of the AND cell of the preceding sequential module.

Abstract: A robot comprising a chain of members connected in pairs and mobile with respect to one another under the action of drive device controlled by a computer, each of the members being operative to drive a terminal member of the chain in a movement determined by a monitoring device controlling the computer, a single motor for selectively actuating, via a selection device controlled by the computer, each of the mobile members separately, and a single monitoring coder for selectively determining the movement of the mobile members.

Abstract: This disclosure describes a device for converting binary coded angle information into the analog angular position of the rotor winding of a conventional counter-reaction resolver. The device is operative to provide two periodic rectangular wave signals of equal amplitudes and of time durations respectively proportional to the absolute values of the sine and cosine of the angle. These periodic rectangular wave signals are respectively applied to the stator windings of the resolver via two amplifiers respectively. Each of these amplifiers comprises a counter-reaction loop comprising a compensation winding and a capacitor. The rotor winding of the resolver is inserted in a servocontrol loop comprising an amplifier and a commutator which are connected only in the simultaneous absence of the two periodical rectangular wave signals.

Abstract: A snap switch comprises a control button, a control rod slidable with the control button via a spring, two pairs of contacts associated, respectively, with two pairs of terminals, the two contacts of each pair of contacts being connectable by resilient conducting means under the action of a setting spring fixed to the control rod and to these resilient conducting means. The two contacts of one pair of contacts are borne by two pivotable conducting plates, biased by resilient means for connecting the two contacts borne by the conducting plates to their respective terminals. The conducting plates can be pivoted under the action of the control button and against the action of the resilient biasing means for disconnecting the two contacts borne by the conducting plates from their respective terminals.

Abstract: A magnetic information carrier comprising two magnetic tracks. One track contains coded magnetic information and the other track is deposited in depressions formed in the carrier and filled with a magnetic liquid, for displaying some of the coded magnetic information of the first track.

Abstract: The machine tool of the invention comprises a frame (100) with an upper plate (1), an annular saw blade (3) of which the cutting part is made on its inner periphery and which is supported by a rotatable mandrel (23), and a bar-holder carriage (2) pivotable above the upper plate (1) of the frame (100). The bar-holder carriage (2) is in abutment on an air cushion formed between the lower face of the bar-holder carriage (2) and the upper face of the plate (1) of the frame (100).

Abstract: This invention relates to a reduction mechanism including two gear trains, of different speed reductions, for rotating one cam, both gear trains having different input gears but a same output gear, said input gears being rotatable by a step-up gear mounted on a pivotable lever and rotatable by a driving pinion coupled to a motor, a second pivotable lever having followers responsive to ramp means provided on said cam for suddenly pivoting said first lever through a spring linked to said two levers and thus moving said step-up gear into engagement with the input gear of one or the other of said two gear trains.

Abstract: Programmer for electric household appliances, comprising an assembly of programming cams driven in rotation by a reversing cam driven itself by a motor, a timing wheel driven in rotation by the reversing cam via a set of levers, a first cam of the cam assembly triggering off the rotating of the timing wheel and the simultaneous stopping of the cam assembly, a cam surface on the timing wheel triggering off again the rotating of the cam assembly and the stopping of the timing wheel after a timing the period of time of which is determined by a second cam of the cam assembly.

Abstract: An ultrasonic flowmeter for measuring the rate of flow of a fluid, comprising a conduit and two acoustic probes placed on a line inclined with respect to the axis of said conduit. The active end of the probes are bathing in an annular chamber formed by a sleeve extending the inner wall of the conduit in the measuring zone and a swell in the inner wall of the conduit, and in which the fluid may penetrate.

Abstract: Device for measuring the flow speed of a fluid, comprising sound wave transmitting-receiving probes placed in the fluid flow, wave generating means, transforming means for exploiting the electrical signals, such as amplifiers, counting circuits and integrating circuits, characterized in that a plurality of integrators with variable time constant are periodically put to zero once their outputs have been sampled, said operations being made by analog switches.

Abstract: A timing device comprises a contact assembly, an acting switch and a centrifugal mechanism rotated by a synchronous motor, and a rotatable resiliently biased timing wheel. The acting switch, upon energization of the motor, is moved axially in a direction parallel to the rotary axis of the timing wheel by the centrifugal mechanism to a first position for rotating the said timing wheel and opening a contact between a movable contact plate and a first fixed contact plate of the contact assembly. The acting switch is maintained in the first position by the timing wheel, and is moved to a second position for maintaining the timing wheel in position and closing a contact between the movable contact plate and a second fixed contact plate of the contact assembly, whereby, upon deenergization of the motor, the switch is moved axially in the reverse direction to its normally inoperative state and said timing wheel is rotated back under the action of its biasing means.

Abstract: A device for producing at the output of a multivibrator an electric signal the period of which is a linear function of a temperature to which is subjected the measuring probe, characterized in that said multivibrator consists in a comparator whose first input comprises the probe, said probe consists in at least two semi-conducting junctions connected two by two in parallel and in opposite directions, and the other components of the device, particularly those of the second comparator input comprising a capacitor, remains invariable.

Abstract: An authentication method for standardized objects, such as in particular monetary articles, in which an object to be authenticated is introduced into the field located between an emitter and a receiver delivering at least an alternative physical quantity, whose quantitative alteration produced by the presence of said object in said field is measured, the result being compared with a reference value pre-stored in a memory and distinctive of the object to authenticate, whereby, within a tolerance approximation, an authentication criterion is deducted, method characterized by the fact that said alteration is measured at different frequencies, that corresponding alterations are successively measured and then simultaneously compared with said respective reference quantities.

Abstract: Device for measuring the volumetric flow rate of a fluid flowing through a generally tubular body, wherein a swirling motion is imparted to the fluid by a precessing means, comprising a device producing a variable frequency signal depending on the precession motion of the fluid, associated with a logical means arranged for correcting said frequency, characterized in that the precessing means comprises in succession, in the flowing direction of the fluid, a first cylindrical duct communicating with a converging cylindrical-conical axial chamber through a second duct the axis of which is displaced and inclined in relation to the axis of said chamber, the latter communicating co-axially with a cylindrical terminal duct through a third cylindrical duct of restricted diameter connected to said terminal duct by a diverging conical enlargement.

Abstract: Gyroscope motor of the type comprising a magnetized rotor constituted by a permanent magnet in the shape of a toroid, within which are disposed the stator windings, the commutation being ensured by means of a static detector operating by variation of the impedance of a winding placed in the magnetic circuit, wherein the saturation of said magnetic circuit is obtained directly by means of the field of the rotor.